Function Magnets
Description: A detailed scientific illustration of a circle of radius R with a highlighted chord and central angle θ, ringed by stars, above the chord formula crd θ = 2R sin(θ/2), set against a deep dark background. Hipparchus of Nicaea (c. 190–120 BC) compiled the first known table of chords, the ancestor of the sine function. He also made one of the first star catalogues and discovered the precession of the equinoxes. A gift idea for mathematicians, math teachers and engineers, and a quiet statement piece for a study, classroom or office wall.
Hipparchus Table of Chords, the Origins of Trigonometry and the Sine Function Magnet
by Science Design
$3.75 $4.75
Description: A dark background with lines of computer code. Key phrases include "const displayElement =", "let userCount = 1024;", "function processData(input)", "// abstract digital representation", "return input.toUpperCase();", and "processData('Vector Art');". The code is displayed in a monospaced font with different colors for keywords and strings.
Description: A black background with white mathematical equations arranged in a circular pattern resembling a clock face. White clock hands are positioned at the center. Equations include "x² + y² = z²", "lim (1/x)", "∫ e^x dx", "f(x) = mx + c", "d/dx sin(x)", "e^(iπ) + 1 = 0", "log10(100)", "2³ - 1", "√(16+2)", "(3+2)²", "√144", "Σ n/n!", and "π ≈ 3.14159".
Description: A dark-themed visual representation of programming code with line numbers on the left. At the center, highlighted in white bold text, reads 'It worked on my local'. The code contains various function calls, variable declarations, and comments, with some lines displaying subtle orange and yellow gradients.
Description: A white line diagram on a black background illustrating a control system. It features a summation circle with inputs 'r' and 'e', and outputs 'r', 'e', and 'u'. Two blocks labeled 'C' and 'F' are connected, receiving and sending 'y' signals. Another block labeled 'P' is grounded. Below the diagram, the equation 'H(s) = H(s) / 2' is displayed.
Description: A monochrome text-based representation of the Fourier transform formula. The top line reads 'Fourier transform' in a bold, sans-serif font. Below, the mathematical equation F(\xi) = \int_{-\infty}^{\infty} f(x)e^{-i2\pi x\xi} dx is displayed.
Fourier transform F(\xi) = Integral of f(x)e^{-i2\pi x\xi} dx Magnet
by Pastel Dream Nostalgia
$4.75
Description: A black background features white text stating "MATH PUNS" at the top. Below this is a yellow and white waveform graphic. The next line reads "ARE THE THE" in white. Prominently displayed are the words "FIRST" in white and "SINE" in yellow. The bottom line reads "OF MADNESS" in white. Small tick marks resembling rulers appear on the left and right sides of the design.
Description: A graphic featuring mathematical diagrams of a parabola and a cone. The text reads "MY PARABOLA DON'T WANT NONE" in yellow and white, and "UNLESS YOU GOT CONES HUN" in white and yellow. The parabola is shown on a coordinate plane, and the cone has labeled points and dashed lines.
Description: A dark background displays lines of Python code in various bright colors. Key elements include function definitions like 'def process_data(data):', variable assignments like 'index = "Initialize"[]', and conditional statements like 'if check(item):'. The code appears to be processing data and computing results.
Description: A black background displays a mathematical equation in white text and symbols. The equation begins with an integral symbol from 'n' to 'f', followed by '1', a summation symbol, '(', 'x', '=', and a square root symbol over a summation symbol, followed by ',', '(', 'x', ')', ')'. The words 'Fourier transform' are displayed prominently at the top.
Description: A graphic with a mathematical formula at the top, "f(x) = ∑ f(n)(a) / n!(x-a)n". Below the formula, in large block letters with a textured overlay, reads "TAYLOR SERIES" on the first line and "THE ERRORS TOUR" on the second line. The background is split between light grey and black.
Description: A dark background displays lines of code. It features variable declarations like "let userValue = 10;", "let count = 1;", and "let isperfect = true;". A "while" loop condition "(count <= userValue)" and an "if" condition "(count % 2 === 0)" are visible, along with "ship(count);" and "count++;".
Description: A black background displays a white control system block diagram. It includes labels 'r', 'e', 'C', 'u', 'P', 'y', and 'F'. Below the diagram is a mathematical formula for H(s) with 's' as the variable, showing the transfer function of the system.
Control System Diagram with Formula H(s) = P(s)C(s) / (1 + P(s)C(s)F(s)) Magnet
by funnymushroomz
$4.75
